Mumbai/New Delhi: L K Advani's prediction of a non-Congress, non-NDA alliance coming to power after 2014 polls generated more heat on Tuesday with Shiv Sena supremo Bal Thackeray slamming the BJP leader while differences within key ally JD(U) on the issue also came to the fore.

In hard-hitting comments, Thackeray asserted that Advani's musings on the outcome of the 2014 polls in his latest blog was "demoralising" for the opposition NDA and likened the assessment to an Army General saying before a war that there is no guarantee on the outcome.

"This is like a General saying before a war that there is no guarantee on the outcome, and demoralising the entire Army," Thackeray said in an editorial in party mouthpiece 'Saamana'.

"If Advani has any doubts, he can come to me and I will give him a dose of morale and strength," Thackeray said and asked NDA "not to lose heart".

RSS ideologue M G Vaidya said it was premature to make a prediction at this stage.

"It is premature at this stage. It would be inappropriate to say anything at this stage," Vaidya said.

Advani's prediction saw difference surface in the JD(U) with its Rajya Sabha MP Shivanand Tiwari, who is known to be close to Bihar Chief Minister Nitish Kumar, backing the BJP veteran, saying he "understands the pulse of the country's politics".

Tiwari's comments came a day after after JD (U) chief and NDA convenor Sharad Yadav voiced his "complete disagreement" with Advani's prediction.

"Advaniji is a very senior person. He has contested many an election and toured the country extensively. He understands the pulse of the country's politics and the trends. He has written something on the basis of an objective analysis," Tiwari said.

Yadav, who is not on the same page with Nitish on some issues, had said he "completely disagrees" with Advani's contention and maintained that UPA will lose the next elections "badly" and NDA will emerge as the largest alliance.

Akali Dal leader Sukhdev Singh Dhindsa said though Advani's assessment was his personal point of view, they could damage the party.

Chhattisgarh Chief Minister and BJP leader Raman Singh said Advani's remarks would have no impact on the state Assembly election due in 2013.

RJD chief Lalu Prasad said, "It is the coalition era which will continue for long. There are polarisation of votes. Now the elections will be fought between two camps—secular forces versus communal forces."

He predicted that secular parties will always emerge victorious whenever there is a fight between the two camps.

"All secular parties will come together and will come to the Centre. There is no possibilities of a Third front or fourth front. Voters will reject the communal forces again and secular parties will form the government."